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• Ex vivo and computational study Date verified

  Machine learning guided design found an inulin linked butyrate motif in synthetic gut communities

  Machine learning guided design of synthetic gut communities identified a butyrogenic motif involving inulin, Bacteroides uniformis and Anaerostipes caccae, validated in human fecal communities ex vivo.

  Nature Chemical Biology 22(8):1286 · Connors et al. · 27 July 2026

  microbiomefiberresearch-methods
• Human feeding study 27 July 2026 is the date of the Cornell Chronicle story; the journal publication date is not stated in the digest and was not verified at source.

  Whether fiber helps may hinge on which strain of one gut bacterium you carry

  Cornell researchers fed resistant starch to more than 50 people and sequenced their microbiomes at strain level. Different strains of the same species, Bifidobacterium adolescentis, responded to the identical fiber in opposite directions.

  Microbiology Spectrum · Poole et al. · 27 July 2026

  microbiomefibergut-health
• Conference abstract, not peer reviewed Date verified

  Prebiotic sodas vary fourfold in fiber and two thirds contain artificial sweeteners

  A label audit of 108 US prebiotic sodas launched 2021 to 2025 found an average of 35 kcal, 5 g sugar and 5 g fiber per 12 oz can, fiber ranging from 2 to 9 g, and non nutritive sweeteners in about two thirds of products.

  NUTRITION 2026, American Society · Carlos et al. · 25 July 2026

  fibergut-healthfood-labeling
• Expert opinion (Current Opinion article) Date as listed in the digest; not independently verified at source.

  Low FODMAP diets are being handed to athletes who may not need them

  A Current Opinion in Sports Medicine argues that symptom severity, not habit, should decide whether an athlete restricts FODMAPs. Athletes with mild or occasional symptoms are likely better served by a more liberal FODMAP intake that supports gut integrity.

  Sports Medicine · Scrivin et al. · 24 July 2026 · PMID 42496856

  gut-healthGI-distressfodmapfiberendurance-fueling
• Human comparative study; design unconfirmed, abstract not retrieved Date verified

  Two fiber types went head to head on human bile acid profiles

  A human comparison of resistant starch versus polydextrose examined plasma and faecal bile acid profiles with microbiota associations; the abstract could not be retrieved before PubMed access closed, so no results are summarized.

  European Journal of Nutrition · Fan et al. · 23 July 2026 · PMID 42489745

  fibergut-healthmicrobiome
• Convergent mixed methods, observational The digest lists July 2026 without a day; not verified at source.

  Only about a quarter of women at the IRONMAN Worlds hit carb loading targets

  Among female triathletes at the 2024 IRONMAN World Championships, only 6 of 23 reached the 8 to 12 g/kg carbohydrate loading guideline. Interviews found the gap was not knowledge but travel logistics, nerves, food access, and identity around eating.

  European Journal of Sport · Fortis et al. · undefined July 2026 · PMID 42274547

  female-athletescarbohydrateendurance-fuelingGI-distressfiber
• 2x2 factorial randomized controlled trial Published 24 February 2026. Press release 25 July 2026. Cite the February date.

  People stuck with a daily fiber far better than they stuck with exercise

  In a six week randomized trial in adults with knee osteoarthritis, 20 g/day inulin reduced pain by roughly as much as a supported exercise programme, and the dropout gap was striking: 3.6% left the inulin arm against 21% for exercise.

  Nutrients 18(5):714 · Kouraki et al. · 24 February 2026

  fibergut-healthadherence
• Randomized crossover, multi site Published 20 Feb 2026. Press release 4 Aug 2026. Cite the February date.

  Four weeks plant based, and recreational athletes performed about the same

  In a four site randomized crossover using university dining halls, 36 recreational athletes showed no significant difference in a 12 minute run or composite machine strength between a plant based and an omnivorous month, though the strength interval leaned toward the omnivore diet.

  Nutrition Journal · Raygoza et al. · 20 February 2026

  proteinfibergeneral-nutritionresearch-methods